tealdeer: fix tests on darwin (#462776)

  '';

  # Disable tests that require Internet access:

  checkFlags = [

    "--skip test_autoupdate_cache"

    "--skip test_create_cache_directory_path"

    "--skip test_pager_flag_enable"

    "--skip test_quiet_cache"

    "--skip test_quiet_failures"

    "--skip test_quiet_old_cache"

    "--skip test_spaces_find_command"

    "--skip test_update_cache"

    "--skip test_update_language_arg"

  ];

  checkFeatures = [ "ignore-online-tests" ];

  # tealdeer requires --test-threads=1

  dontUseCargoParallelTests = true;

  meta = with lib; {

    description = "Very fast implementation of tldr in Rust";